AI 中文总结
该研究提出利用线性极化光子融合与双标记质子的产生侧偏振测量方法，可实现与衰变分析器无关的光子耦合自旋零共振CP相位测量，为类轴子粒子等提供紧凑的CP测量途径。
AI 中文摘要
双前向质子标记使前向探测器成为逐事件光子偏振仪，因为每个测量的反冲动量可确定发射光子的横向动量，进而确定其线偏振轴。我们表明，这种产生侧偏振测量可实现与衰变分析器无关的光子耦合自旋零共振CP相位测量。推导了含标量和赝标量耦合的CP混合硬振幅的 leading-power 光子密度收缩，CP相位表现为符号质子-质子方位角中二次谐波的平移，为类轴子粒子及更一般的自旋零共振提供了紧凑的产生侧CP测量方法。
英文摘要
Double forward-proton tagging turns the forward detectors into event-by-event photon polarimeters because each measured proton recoil fixes the transverse momentum, and hence the linear-polarization axis, of the emitted photon. We show that this production-side polarimetry gives a decay-analyzer-independent measurement of the CP phase of a photon-coupled spin-zero resonance. We derive the leading-power photon-density contraction for a CP-mixed hard amplitude with scalar and pseudoscalar couplings. The CP phase appears as a translation of the second harmonic in the signed proton--proton azimuthal angle. This provides a compact production-side CP measurement for axionlike particles and more general spin-zero resonances.
Comments7 pages, 2 figures
